Edgard weber



(No Model.) 2 SheetSheet 1.

E. WEBER. ELECTRIC ARC LAMP.

Patented Apr. 12, 1898.

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{No Model.) 2 Sheets-Sheet 2.

E. WEBER.

ELECTRIC ARC LAMP.

No. 602,380, Patented Apr.-12, 1898.

ITQVW UNITED STATES PATENT FFICE.

EDGARD \VEBER, OF PARIS, FRANCE, ASSIGNOR TO PAUL MERSCH, OF SAME PLACE.

ELECTRiC-ARC LAM P.

SPECIFICATION forming part of Letters Fatent No. 602,380, dated April 12, 1898.

Application filed September 11, 1897. Serial No. 651,381. (No model.) Patented in France April 30, 1897, No. 266,489, and in Austria JulyG, 1897, l014:7/2,57O.

T0 ctZZ whom it may concern.-

Be it known that I, EDG-ARD \VEBER, a subject of the Grand Duke of Luxemburg, residing at Paris, France, have invented certain Improvements in Electric-Arc Lamps, (for which I have obtained a patent in France, dated April 30, 1897, No. 266,489, and in Austria, dated July 6, 1897, No. 47/2,570,) of which the following is a specification.

This invention relates to the regulator or voltaic-arc lamp represented, by way of example, in the accompanying drawings, in which Figure 1 is a vertical section taken in the plane of the carbon-holder guides. Fig. 2 is a vertical section taken at right angles to that shown in Fig. 1. Fig. 3 is a horizontal section upon the line 3 3 of Fig. 2, and Fig. 4 is a horizontal section upon the line 4 at of 'Fig. 1.

The frame of this lamp comprises a plate A, upon which are fixed two rods B and B, suitably connected at their lower ends by a cross-piece O, and two other rods D and D, suitably insulated from the body of the lamp and tightened above and below by means of nuts d d, these latter rods serving, respectively, as guides for the carbon-holders E and E, which will be referred to later.

Upon the plate A are arranged two bobbins F and F, the cores f and f of which are connected by soft-iron pole-pieces G G, in the center of which are respectively fixed masses of soft iron g and g. Between these masses 9 and g is placed a disk H of soft iron and armatures J and J. The disk H is mounted upon an axis h, turning on the pivots a and a, which are screwed into the copper plates Z) and b, fixed upon the said masses of soft iron 9 and g, parallel with the bobbins F and F, while the armatures J and J, situated one on each side of the disk H, are mounted loose upon the axis Hand are connected by means of a copper frame K, which surrounds the disk without interfering with its motion.

The disk H has two annular grooves c and 0, one in the middle of its thickness and the other at one side. The groove 0 receives a cord or small chain I, to the free extremities of which are attached the carbon-holders E and E, which are thus rendered, so to speak, integral one with the other. The groove 0 receives a metal cord 1', one of the extremities of which is attached to the extremity 7.; of the frame K, while the outer extremity is fastened to a flat spring i, which may be regulated by means of the set-screwj, working in a support it, fixed upon the plate A. The extremity 7t" of the frame K is connected with a counterweight or a spring 6, attached to the plate A, the tension of such spring or the like being regulable as desired.

The plate A is provided with two terminals Z and Z, one of which is electrically connected to the guide-rod D and the other to the rod D and likewise to the two bobbins F and F, wound with fine wire and which are consequently in shunt upon the main circuit.

The carbon-holders E and E each comprise a cross-piece having in the center a socket, in which the carbon may be held by means of a screw-clamp or in any other suitable manner. The cross-pieces of the carbon-holders are rigidly connected with tubes 75 and t, which are passed upon the guide-rods D and D respectively, each of such tubes having a fork the arms of which touch the corresponding distance-rods B and B. The upper carbonholder E is made heavier than the lower in order that it may serve as an actuatingweight tending to cause the carbons to approach each other when they are otherwise free to do so.

Having thus described the construction of the lamp, I will now explain its action.

Assuming the carbons to be fixed in the carbon-holders E and E and separated and the armatures J and J outside the polar masses g and g, as shown in Fig. 1 of the drawings, the current entering the lamp passes by way of the terminal Z through the bobbins and leaves. by the other terminal Z without passing through the guide-rods D and D, the carbon-holders E and E, and the carbons themselves, owing to the separation of these latter, which separation is maintained by the brake-cord I pressing upon the disk H, which is rendered immovable. H11- der the influence of this current a magnetic field is developed in the bobbins F and F, exciting the polar masses g and g, which attract their armatures J and J, which are loose upon the spindle h. Owing to this at traction the frame K, rigidly connected with the armatures, moves at the same time in the direction of the arrow 50, Fig. 1, and releases the brake-cord I, and consequently leaves the disk H free to revolve, thus allowing the carbons to approach each other. It should be noticed that such approach will be gradual, because the excited polar masses g and g act as brakes upon the periphery of the disk II, whose circular form they follow. As soon as the carbons make contact the current passes wholly through the main circuit, consisting of the guide-rods D and D and the carbons, and the excitation ceases in the bobbins IF and F and in the polar masses 9 and g. The armatures J and J under the influence of the spring 6 or of a counterweight again assume their initial p0sitions,so that the cord 1 is again stretched and presses strongly upon the disk, which latter is consequently drawn slightly back, causing the carbons to separate, whereupon the voltaic arc is formed between them. In proportion to the consum ption of the carbons the voltage increases at the terminals Z and l, and the excitation of the polar masses g and g follows the same progression. The armatures J and J are then attracted, and the released brake cord 1 leaves the disk H free to turn in the direction of the arrow 00, so as to cause the carbons to approach each other. Such approach takes place slowly and uniformly, because the excitation of the polar masses g and g acts upon the disk H in the manner of a brake, and the release of this brake takes place in inverse ratio to the engagement of the ar1natures under the polar masses. Such is the method of action of the voltaic-arc regulator proper, which forms the subject of this application and in which it should be noticed that the guide-rods D and D of the carbonholders are protected from all shocks by the externally-placed distance-rods B and B and that the said rods are sufiiciently rigid to insure the carbons being accurately guided.

Finally, I would point out that the essential parts forming the invention may be made of any suitable shapes and dimensions and also that the arrangement of the accessory parts maybe varied without departing from the nature of the invention.

That I claim is 1. In voltaie-arc lamps or regulators, having carbon-holders connected by a cord or small chain, one of which carbon-holders is heavier than the other so as to actuate them, the arrangement of a disk H, around which passes the said cord, of armatures J and J mounted loose upon the spindle of this disk, and connected with a mechanical brake aeting upon the disk and submitted to the action of a spring or of a counterweight, and of an electromagnet F F arranged in shunt upon the main circuit,and between the polar masses 9 and g of which is arranged the disk II and the armatures J J above referred to; the ob ject of the said arrangement being, when the voltage increases at the lamp-terminals and the electromagnet receives a proportional quantity of the current, to release the mechanical brake by the attraction of the armatures and to exert a magnetic braking upon the disk, in such a manner that the carbons approach each other slowly, regularly and without jerks, as above specified.

2. In an are-lamp, the combination of a frame, two carbon-holders slidable thereon toward and from each other, a flexible connection attached to each carbon-holder, a disk over which said connections are wound, a brake-cord for the disk, a non-magnetic frame swinging loose on the axis of the disk and having connection with said brake-cord, an armature in connection with said frame, and an electromagnet with which the armature coacts, the electromagnet being in proximity with the disk, and the disk being mag netic for coaction with the electromagnet.

8. The combination of an electromagnet, a magnetic disk in the field thereof, a brake strap for the disk, a non-magnetic frame.

swinging on the axis of the disk and connected with the brake-strap, an armature in connection with the frame and eoactin g with the magnet, two carbon-holders, and connections between said carbon-holders and the disk.

4. The combination of an electromagnet having two pole-pieces arranged one above the other, a magnetic disk located between and in the field of said pole-pieces, a brakestrap for the disk, a non-magnetic frame swinging on the axis of the disk and connected with the brake-strap, a spring aetuating said non-magnetic frame, two itllllft tures attached to the frame and located one on each side of the disk and coacting with the pole-pieces, two carbon-holders, and a cord attached to each carbon-holder, the cord being wound oppositely over the disk.

5. The combination with a frame, of an electromagnet, a magnetic disk in the field of said magnet, a brake for the disk, an armature coacting with the magnet and controlling the brake, the magnet serving to retard the revolution of the disk, and a carbonholder having connection with the disk.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ED GARD VEBER.

Vitn esses:

LEON FRANCKEN, EDWARD I MACLEAN. 

